Note there is a caveat in IOS today where it would reject overlapping IPv6 addresses as configured above, ie., a /128 on the tunnel and /64 on the LAN interface, with the %IPV6_ADDRESS-3-ADDRESS_CFG error. The workaround is to remove the IPv6 address configuration from the Tunnel interface and use the command ipv6 enable to have a link-local ipv6 address assigned to the Tunnel.

Related show Commands

This section provides information you can use to confirm your configuration is working properly.